export default {
	namespaced:true,
	state:()=>({
		
		cart:JSON.parse(uni.getStorageSync('cart') || '[]'),
	}),
	
	mutations:{
		// 更新购物车物品勾选状态
		updateGoodsState(state,goods){
			const findResult = state.cart.find(x=>x.goods_id===goods.goods_id)
			if(findResult){
				findResult.goods_state = goods.goods_state
				this.commit('m_cart/saveToStorage')
			}
			
		},
		//更新购物车每个商品的数量
		updateGoodsCount(state,goods){
			const findResult = state.cart.find(x=>x.goods_id===goods.goods_id)
			if(findResult){
				findResult.goods_count = goods.goods_count
				this.commit('m_cart/saveToStorage')
			}
			
		},
		//通过id删除购物车商品
		removeGoodsById(state,goods){
			state.cart = state.cart.filter(x=>x.goods_id !== goods.goods_id)
			this.commit('m_cart/saveToStorage')
		},
		//加入购物车
		addToCart(state,goods){
			const findResult = state.cart.find(x=>x.goods_id === goods.goods_id)
			if(!findResult){
				state.cart.push(goods)
			}else{
				findResult.goods_count++
			}
			this.commit('m_cart/saveToStorage')
		},
		//更新购物车商品所有状态（全选/全不选）
		updateAllGoodsState(state,newState){
			state.cart.forEach(x=>x.goods_state=newState)
			this.commit('m_cart/saveToStorage')
		},
		// 本地储存购物车信息
		saveToStorage(state){
			uni.setStorageSync('cart',JSON.stringify(state.cart))
		}
	},
	getters:{
		total(state){
			// let c = 0
			// state.cart.forEach(x => c += x.goods_count)
			// return c
			return state.cart.reduce((total,item)=>total += item.goods_count,0)
		},
		checkedCount(state){
			return state.cart.filter(x=>x.goods_state).reduce((total,item)=>total += item.goods_count,0)
		},
		checkedGoodsAmount(state){
			return state.cart.filter(x=>x.goods_state).reduce((total,item)=>total += item.goods_count*item.goods_price,0).toFixed(2)
		}
	}
}